Press the green flag and watch the pathfinder forever find the correct path. Turbo mode and fullscreen should work fine. Let me know of any bugs.
I saw some really cool AI pathfinding stuff recently so I decided to try to make my own pathfinder. Everything but the circle is generated by pen. The paths are randomized in length and in location as well as the path it picks to be the correct one. The circle will go to the right until it hits the black line, go up until it's no longer touching it, and then go right until it hits purple. When it hits purple it goes back to the location it recorded before beginning to go right then moves up until it touches the black line again and repeats the process until it finds the right path. Everything you see is created in one sprite. I may incorporate some of these things I've made in a game I make in the future. This is pretty simple and way less advanced as most of the other things I've seen :(